GitHub CLI `gh codespace jupyter` could allow remote code execution when connecting to a malicious Codespace
A vulnerability exists in GitHub CLI version 3.0 where the 'gh codespace jupyter' command could allow remote code execution when connecting to a malicious Codespace. This issue is tracked as CVE-2026-59831 and is associated with CWE-829 (Inclusion of Functionality from Untrusted Control Sphere). No patch or official remediation has been provided yet. There are no known exploits in the wild at this time.
AI Analysis
Technical Summary
The GitHub CLI 'gh codespace jupyter' command in version 3.0 contains a vulnerability that could allow an attacker controlling a malicious Codespace to execute arbitrary code remotely on the client machine. This vulnerability is identified as CVE-2026-59831 and relates to improper trust boundaries (CWE-829). No CVSS score or detailed vendor advisory is available, and no patch has been linked. The vulnerability affects exactly version 3.0 of the GitHub CLI.
Potential Impact
Successful exploitation could lead to remote code execution on the user's system when connecting to a malicious Codespace via the 'gh codespace jupyter' command. This could allow an attacker to execute arbitrary commands with the privileges of the user running the CLI. No known exploits have been reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the Microsoft Security Response Center advisory for current remediation guidance. Until a fix is available, users should exercise caution when connecting to untrusted or unknown Codespaces using the 'gh codespace jupyter' command.
GitHub CLI `gh codespace jupyter` could allow remote code execution when connecting to a malicious Codespace
Description
A vulnerability exists in GitHub CLI version 3.0 where the 'gh codespace jupyter' command could allow remote code execution when connecting to a malicious Codespace. This issue is tracked as CVE-2026-59831 and is associated with CWE-829 (Inclusion of Functionality from Untrusted Control Sphere). No patch or official remediation has been provided yet. There are no known exploits in the wild at this time.
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The GitHub CLI 'gh codespace jupyter' command in version 3.0 contains a vulnerability that could allow an attacker controlling a malicious Codespace to execute arbitrary code remotely on the client machine. This vulnerability is identified as CVE-2026-59831 and relates to improper trust boundaries (CWE-829). No CVSS score or detailed vendor advisory is available, and no patch has been linked. The vulnerability affects exactly version 3.0 of the GitHub CLI.
Potential Impact
Successful exploitation could lead to remote code execution on the user's system when connecting to a malicious Codespace via the 'gh codespace jupyter' command. This could allow an attacker to execute arbitrary commands with the privileges of the user running the CLI. No known exploits have been reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the Microsoft Security Response Center advisory for current remediation guidance. Until a fix is available, users should exercise caution when connecting to untrusted or unknown Codespaces using the 'gh codespace jupyter' command.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_vex
- Csaf Version
- 2.0
- Publisher
- Microsoft Security Response Center
- Advisory Id
- msrc_CVE-2026-59831
- Cve Count
- 1
- Additional Cves
- []
- Cvss Version
- null
Threat ID: 6a58b3ff68715ace43d66cdd
Added to database: 07/16/2026, 10:35:43 UTC
Last enriched: 07/16/2026, 10:45:57 UTC
Last updated: 07/16/2026, 19:47:33 UTC
Views: 3
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